CN114592503A - Splicing matching assembly, splicing structure and precast pile connecting mechanism - Google Patents

Abstract

The invention provides a splicing matching assembly, a splicing structure and a precast pile connecting mechanism. The inserting and connecting matching assembly comprises an inserting rod and a positioning assembly, the inserting rod is provided with a first groove extending along the axis direction, the positioning assembly comprises an opening portion, a first matching portion is arranged on the outer peripheral wall of the inserting rod in an upwards protruding mode, a second matching portion is arranged on the positioning assembly, the inserting rod can stretch into the positioning assembly, the opening portion can stretch into the first groove and open the inserting rod, and the first matching portion is matched and fixed with the second matching portion. The expansion part of the plug-in fit assembly provided by the invention enables the plug rod to deform and to be matched and fixed with the positioning seat to realize plug-in fixation, so that the connection strength of the plug-in fit assembly after butt joint and the bearing limit performance of lateral shearing or impact can be improved, and the plug-in fit assembly is not easy to shake or damage in strength. Therefore, the connection stability after the butt joint of the inserting and matching assembly is improved, and the connecting device can be used for reliably butt-jointing and fixing an external structure, such as a prefabricated building pile.

Description

Plug-in matching component, plug-in structure and precast pile connecting mechanism

Technical Field

The invention relates to the technical field of buildings, in particular to a splicing matching component, a splicing structure and a precast pile connecting mechanism.

Background

In the technical field of buildings, the end parts of two prefabricated pile connecting mechanisms are often required to be mutually butted and fixed, so that the length of the prefabricated pile connecting mechanisms is prolonged, and specific construction requirements are met. The common butt joint means is that a quick butt joint component is arranged between two prefabricated pile connecting mechanisms, and the quick butt joint component is respectively connected with axial reinforcing steel bars in the two prefabricated pile connecting mechanisms and can be mutually spliced to form non-detachable fixed connection.

The connection stability after the existing quick butt joint assembly is in butt joint is low, the existing quick butt joint assembly is easy to shake or even has strength damage when being subjected to lateral shearing or impact action, and the prefabricated pile connecting mechanisms at two ends cannot be guaranteed to be reliably and relatively fixed.

Disclosure of Invention

The invention provides a plug-in matching component which comprises an inserting rod and a positioning component, wherein the inserting rod is provided with a first groove extending along the axis direction, the positioning component comprises an expanding part, a first matching part is convexly arranged on the outer peripheral wall of the inserting rod, a second matching part is arranged on the positioning component, the inserting rod can extend into the positioning component, the expanding part can extend into the first groove and expand the inserting rod, and the first matching part and the second matching part are matched and fixed.

In an embodiment of the present invention, the positioning assembly includes a positioning seat and a spreading member, the second matching portion is located at the positioning seat, and the positioning seat is further used for being connected and fixed with an external structure; the opening part is positioned on the expanding part, and the positioning seat and the expanding part are integrally formed.

So set up, the in-process that the portion progressively inserted in to first recess struts, the positioning seat through the integrative expansion piece that sets up not only realize with the grafting of inserted bar fixed, still produced the direction grafting effect to the inserted bar, improve the axiality between inserted bar and the positioning seat.

In one embodiment of the present invention, the positioning assembly includes a positioning seat and an expanding member, the second matching portion is located at the positioning seat, and the positioning seat is further used for being connected and fixed with an external structure; the expanding part is positioned on the expanding piece, the expanding piece and the positioning seat are formed in a split mode, and the expanding piece and the positioning seat are in threaded connection, welding, gluing or interference connection.

So set up, the positioning seat can process respectively and realize relative fixed connection with expanding the piece, expands the fixed connection of piece and positioning seat and easily realizes and good reliability, has improved the axiality after inserted bar and positioning seat are pegged graft fixedly.

In one embodiment of the invention, a first clamping tooth group extending along the axial direction is arranged on the outer circumferential wall of the inserted link and forms a first matching part, and a second clamping tooth group matched with the first clamping tooth group is arranged on the inner circumferential wall of the positioning seat and forms a second matching part; the opening portion can extend into the first groove and open the inserted rod, so that the first clamping tooth group and the second clamping tooth group are meshed with each other.

So set up, be connected through the tooth meshing cooperation between inserted bar and the positioning seat, can guarantee the stability of the two after fixing, can combine into whole and can not relative slip or dislocation more closely, avoid inserted bar and positioning seat fixed failure, be favorable to improving the durability of pegging graft cooperation subassembly.

In one embodiment of the invention, a first guide portion is arranged on one of the first bayonet tooth group and the second bayonet tooth group, and the first guide portion is obliquely arranged relative to a radial plane of the inserted rod.

So set up, thereby can realize the meshing fast under the guide effect of first guide part relative slip between first latch group and the second latch group, can reduce inserted bar and positioning seat plug connection's resistance simultaneously, realize the quick butt joint of low resistance of grafting cooperation subassembly.

In an embodiment of the invention, a first stopping portion is arranged on one side of the first latch group or the second latch group, which is opposite to the first guide portion, and the first stopping portion can stop the insertion rod from being pulled out of the positioning seat.

So set up, first backstop portion can further improve the fixed reliability of tooth meshing between inserted bar and the positioning seat, prevents that the inserted bar from along the direction relative motion of keeping away from the positioning seat under the external force interference, guarantees under the state that the expanding piece struts the inserted bar, and inserted bar and positioning seat remain the tooth meshing throughout and fix.

In one embodiment of the invention, the radial dimension of the spreader portion increases in the direction of insertion of the plunger.

So set up, along with the degree of depth increase that the portion of strutting inserted first recess, the deformation volume that the inserted bar expands along radial outside increases, and the portion of strutting expands the increase of supporting power that the internal face of portion applied to first recess, and the inserted bar deformation is more abundant, therefore makes the cooperation between inserted bar and the locating component fixed more abundant, is favorable to improving the fixed effect of inserted bar and locating component.

In one embodiment of the invention, the distractor portion is conical or frusto-conical.

Due to the arrangement, the shape of the expanding part is simple, so that the expanding part is more convenient to machine and form, and the difficulty in mutual insertion of the inserted rod and the expanding part is further reduced; and the deformation process of the peripheral wall of the inserted rod is mild, which is beneficial to reducing the difficulty of inserting the inserted rod and the expanding piece.

In one embodiment of the invention, the inserted rod comprises a connecting part and an inserting part which are connected with each other, the connecting part is used for being connected with an external structure, the inserting part comprises a plurality of fins, the fins surround and form a first groove, and the fins can move away from each other under the action of the expanding piece so as to enable the first clamping tooth group and the second clamping tooth group to be meshed with each other.

According to the arrangement, in the process of inserting the inserted bar into the positioning assembly, the expansion part enables the plurality of fins to generate deformation expanding outwards along the radial direction of the inserted bar, the arrangement of the plurality of fins further improves the deformation capacity of the inserted bar under the extrusion action of the expansion part, and the probability of strength damage generated when the inserted bar deforms is reduced; in addition, the influence on the connection reliability of the connecting part and an external structure due to the deformation of the inserting part can be avoided.

In one embodiment of the invention, the number of fins is 2 to 8.

In an embodiment of the present invention, the first latch group includes a plurality of first latches, the second latch group includes a plurality of second latches, and the first latches and the second latches are both annular latch structures arranged along the axial direction.

So set up, the meshing area of contact of inserted bar and positioning seat has been increased in a plurality of first latches and the meshing of a plurality of second latches, has formed firm tooth meshing between inserted bar and the positioning seat and has fixed, is difficult to alternate segregation or slippage under the exogenic action, has improved fixed connection's reliability between inserted bar and the positioning seat.

In one embodiment of the invention, the number of the first latch teeth is less than or equal to the number of the second latch teeth.

So set up, can guarantee that the first latch group of inserted bar can be connected with the meshing of second latch group fully to it is fixed to make to form abundant tooth meshing between inserted bar and the positioning seat.

In one embodiment of the invention, the peripheral wall of the plunger is provided with at least one marking for identifying the depth of the plunger extending into the positioning assembly.

So set up, set up the mark at the inserted bar periphery wall and can demonstrate the position of inserted bar in positioning assembly more directly perceivedly, can clearly will peg graft the cooperation subassembly butt joint condition and feed back to site operation personnel in order to present the form of the relative position information between positioning assembly and the mark to improve the intuitiveness, the convenience of construction operation, be favorable to improving the efficiency of construction.

The invention also provides an inserting structure which comprises a first sleeve, a second sleeve and the inserting matching assembly, wherein the inserting rod is fixedly arranged on the first sleeve, and the positioning assembly is fixedly arranged on the second sleeve.

In one embodiment of the invention, the positioning assembly is threadedly connected to the second sleeve.

So set up, fixed effect is better between locating component and the second sleeve, and the axiality between the two is higher.

In an embodiment of the present invention, a stopping step is disposed in the second sleeve, the positioning assembly includes a positioning seat and an expanding member, the expanding member includes a supporting portion and an expanding portion connected to each other, an outer diameter of the supporting portion is greater than an inner diameter of the stopping step and an inner diameter of the positioning seat, and the supporting portion is positioned in the second sleeve through the stopping step and the positioning seat.

So set up, positioning seat and backstop step synergism are injectd the supporting part in the clearance between positioning seat and backstop step to realized expanding the two-way backstop limiting displacement of propping piece along the axial. In addition, the second sleeve is spacing to the plug position of locating component in the second sleeve through backstop step, can guarantee inserted bar and the telescopic relative position precision of second, and then guarantees first sleeve and the telescopic assembly precision of second.

In one embodiment of the invention, the outer peripheral wall of the positioning seat is convexly provided with a second boss, and the second boss is used for limiting the depth of the positioning seat extending into the second sleeve.

So set up, the second boss is injectd the grafting position of positioning seat in the second sleeve, can guarantee relative position precision and assembly precision between positioning seat and the second sleeve.

In an embodiment of the invention, when the second boss abuts against the second sleeve, a distance between the positioning seat and the stopping step is greater than a height of the supporting portion, so that the expanding member can be movably accommodated in the second sleeve.

So set up, thereby can prevent that the supporting part from contacting the positioning seat and leading to the unable butt of second boss in the second sleeve, formed the space that can supply the positioning seat fully to stretch into the second sleeve between backstop step and the second sleeve open end to leave the activity space allowance, so that the positioning seat does not receive the influence of supporting part when second boss butt second sleeve, avoid the unable fully stretching into of positioning seat in the second sleeve.

In one embodiment of the invention, the maximum range of motion of the spreader portion at the end relatively remote from the support portion is less than the area of the first recess in the radial plane of the plunger.

So set up, the inside space that can supply to strut the portion and keep away from the activity of supporting part tip that forms of first recess to leave the space surplus, avoid when expanding the relative inserted bar activity of support piece, the tip that struts the portion and keep away from the supporting part receives the influence of first recess inner wall, prevents that it from being extruded or colliding by first recess inner wall, consequently can reduce the degree of difficulty of expanding support piece and inserted bar grafting, resistance when eliminating the two and pegging graft.

In an embodiment of the invention, the opening portion is provided with a second groove, and when the opening portion extends into the first groove, the opening portion can radially contract through the second groove.

So set up, under the extrusion of inserted bar, strut the portion and insert the resistance in first recess through radial shrink in order to reduce radial dimension, can further reduce the portion of strutting to reduce the degree of difficulty that the portion of strutting is pegged graft in first recess completely, and then reduce the fixed degree of difficulty of inserted bar and locating component abundant grafting, improved grafting structure's butt joint efficiency.

In an embodiment of the invention, the stopping step is an annular concave surface, and a third protrusion is disposed on a side of the supporting portion opposite to the side far away from the spreading portion, and the third protrusion can be accommodated in the annular concave surface.

So set up, protruding cooperation through annular concave surface and third between backstop step and the supporting part has realized the radial positioning effect to the supporting part, has still further increased the area of contact between backstop step and the supporting part simultaneously so that expand the piece and the laminating contact between the backstop step more stable, can restrict expand the piece and radially rock for the second sleeve.

The invention further provides a precast pile connecting mechanism which comprises at least two precast building piles and the splicing structure, wherein the first sleeve and the second sleeve are fixedly arranged in the two precast building piles respectively, and the two precast building piles are connected through the splicing structure.

According to the plug-in fit assembly provided by the invention, the expanding force is applied to the plug rod through the expanding part, so that the plug rod is deformed and is matched and fixed with the positioning seat to realize plug-in fixation, the connection strength after butt joint of the plug-in fit assembly and the bearing limit performance of the lateral shearing or impact action can be improved, and the plug-in fit assembly is not easy to shake or damage in strength. Therefore, the connection stability after the butt joint of the inserting and matching assembly is improved, and the connecting device can be used for reliably butt-jointing and fixing an external structure, such as a prefabricated building pile.

Drawings

Fig. 1 is an assembly view of a plug structure according to a first embodiment of the present invention;

FIG. 2 is an assembly view of a plug structure according to a second embodiment of the present invention;

FIG. 3 is an enlarged view of a portion of the plug-in structure shown in FIG. 1 at B;

FIG. 4 is an enlarged, fragmentary schematic view of another embodiment of the plug-in structure of FIG. 1 at B;

FIG. 5 is a schematic view of a plunger according to a first embodiment of the present invention;

FIG. 6 is a schematic view of a second embodiment of a plunger according to the present invention;

FIG. 7 is a schematic view of a bayonet according to a third embodiment of the present invention;

fig. 8 is a schematic structural view of an insert rod according to a fourth embodiment of the present invention.

Description of reference numerals:

100. a plug-in mating assembly; 10. inserting a rod; 11. a connecting portion; 111. a first boss; 12. a plug-in part; 121. a fin; 122. A first mating portion; 1221. a first set of teeth; 123. a first groove; 13. a first guide portion; 14. a second guide portion; 15. A first stopper portion; 16. a third guide portion; 20. a positioning assembly; 21. positioning seats; 211. a second boss; 212. an installation part; 213. a third protrusion; 214. a plug space; 215. mounting holes; 216. a second mating portion; 2161. a second latch set; 22. expanding the supporting piece; 221. a support portion; 222. a distraction section; 231. a first guide portion; 232. a second guide portion; 24. a first gap; 200. a plug-in structure; 210. a first sleeve; 201. a stopping step; 220. a second sleeve; 230. reinforcing steel bars; 240. Heading; 250. and (4) contracting the mouth.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

It will be understood that when an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. When an element is referred to as being "secured to" another element, it can be directly secured to the other element or intervening elements may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "or/and" includes any and all combinations of one or more of the associated listed items.

In the field of building technology, it is often necessary to butt-joint and fix the ends of two precast pile connection mechanisms to extend the axial dimension of the precast pile connection mechanisms. The common butt joint fixing means is that a quick butt joint component is arranged between two precast pile connecting mechanisms, and the quick butt joint component is respectively connected with axial reinforcing steel bars in the two precast pile connecting mechanisms and is mutually spliced to form non-detachable fixed connection.

The connection stability after the existing quick butt joint assembly is in butt joint is low, the existing quick butt joint assembly is easy to shake or even has strength damage when being subjected to lateral shearing or impact action, and the prefabricated pile connecting mechanisms at two ends cannot be guaranteed to be reliably and relatively fixed.

In view of the above, the present invention provides a plug-in mating assembly 100, a plug-in structure 200 having the plug-in mating assembly 100, and a precast pile connection mechanism having the plug-in structure 200. The insertion fitting assembly 100 or the insertion structure 200 is arranged between the ends of the two precast pile connection mechanisms and is used for realizing the butt joint fixation of the two precast pile connection mechanisms. In an embodiment of the present invention, the inserting and connecting assembly 100 and the inserting and connecting structure 200 are used for connecting two prefabricated building piles, and it is understood that in other embodiments, the inserting and connecting assembly 100 and the inserting and connecting structure 200 can also be used for butt-jointing and fixing other types of prefabricated pile connecting mechanisms, which is not described in detail herein.

The plug-in matching component 100 provided by the invention comprises a plug rod 10 and a positioning component 20, wherein a plug-in space 214 into which the plug rod 10 can extend and plug in is arranged in the positioning component 20, and the plug rod 10 can extend into the positioning component 20 and is fixed relative to the positioning component 20; the plug structure 200 provided by the invention comprises a first sleeve 210, a second sleeve 220 and the plug matching assembly 100, wherein the plug rod 10 and the positioning assembly 20 are respectively fixedly arranged on the first sleeve 210 and the second sleeve 220. In other words, the first sleeve 210 and the second sleeve 220 are inserted into and fixed to the positioning assembly 20 through the insertion rod 10, so that relative fixation is achieved, and the insertion connection structure 200 can relatively fix the axial reinforcing bars 230 in the prefabricated building piles at two ends.

The first sleeve 210 and the second sleeve 220 are respectively and fixedly arranged at the end parts of the two prefabricated building piles, and are coaxially arranged to form an accommodating space for accommodating the installation of the splicing matching component 100; an end of the first sleeve 210 facing away from the second sleeve 220, and an end of the second sleeve 220 facing away from the first sleeve 210 are respectively connected to the axial rebars 230 of the two prefabricated building piles.

Please refer to fig. 1 to 6. In one embodiment, the first sleeve 210 forms a contraction opening 250 at a side close to the first sleeve 210, and the inner wall surface of the contraction opening 250 is in an annular step shape or a conical surface shape; the inner cavity of the first sleeve 210 forms a first channel for accommodating the steel bar heading 240 and a second channel for the steel bar to pass through at two axial ends of the constriction 250, and the inner diameter of the constriction 250 is smaller than the inner diameter of the first channel and larger than the inner diameter of the second channel.

The constrictions 250 may be used to abut the end upsets 240 of the axial rebars 230 in the pre-cast building pile to prevent the rebars 230 from escaping from the first sleeve 210. Likewise, to achieve the connection of the second sleeve 220 to the axial reinforcement 230, the second sleeve 220 also forms a constriction 250 on the side remote from the first sleeve 210.

Please refer to fig. 1 to 4 again, and refer to fig. 5 to 8. In one embodiment, the insertion rod 10 includes a connecting portion 11 and an insertion portion 12 that are axially disposed and fixed to each other. The connecting part 11 extends into the first sleeve 210 and is fixedly connected with the first sleeve 210, preferably in a thread fixing mode; the inserting part 12 extends out of the first sleeve 210 and extends into the inserting space 214 of the positioning component 20; the outer peripheral wall of the insertion part 12 is further provided with a first matching part 122 for matching and fixing with the positioning component 20, the inner peripheral wall of the positioning component 20 is correspondingly provided with a second matching part 216 matched with the first matching part 122, and the insertion rod 10 is further internally provided with a first groove 123 extending along the axial direction of the insertion rod 10. It is understood that in other embodiments, the insert rod 10 can be fixedly connected to the first sleeve 210 by other means, such as adhesive fixation, welding fixation, and tight fitting fixation, but not limited to threaded fixation.

In an embodiment not shown, the second matching portion 216 may be directly disposed on the inner circumferential wall of the second sleeve 220, that is, the positioning assembly 20 may be omitted, and the second matching portion 216 may be processed at the same time when the second sleeve 220 is manufactured. It will be appreciated that whether the second mating portion 216 is formed directly on the inner peripheral wall of the second sleeve 220 or is disposed on the positioning assembly 20 and then fixedly attached to the inner wall of the second sleeve 220, the second mating portion 216 is substantially identical in structure and in use.

Further, the peripheral outer wall of the insert rod 10 is further provided with a first boss 111, the first boss 111 is located between the connecting portion 11 and the inserting portion 12, and the outer diameter thereof is greater than the maximum inner diameter of the inserting space 214 of the positioning assembly 20 and the maximum outer diameter of the connecting portion 11. The first protrusion 111 can abut against the opening end of the positioning component 20 to limit the depth of the connection portion 11 extending into the first sleeve 210, and can limit the depth of the insertion portion 12 extending into the positioning component 20 or the depth of the insertion portion 12 extending into the second sleeve 220.

Please refer to fig. 1 to 4 again. In one embodiment, the positioning assembly 20 includes a positioning base 21 and a supporting member 22 fixed to each other. The positioning seat 21 is accommodated and fixedly installed in the second sleeve 220, and is hollow and cylindrical, and is used for forming an insertion space 214 into which the insertion rod 10 extends. The inner wall surface of the positioning seat 21 is provided with a second fitting portion 216 fitted and fixed with the first fitting portion 122. Preferably, the outer peripheral wall of the positioning seat 21 is provided with a threaded section, and is fixedly connected with the second sleeve 220 through a thread.

It is understood that in other embodiments, the positioning seat 21 may be fixedly connected to the second sleeve 220 in other manners, and in an embodiment not shown in the drawings, the positioning seat 21 may be integrally formed with the second sleeve 220.

Further, in one embodiment, a second boss 211 is protruded from a circumferential outer wall of the positioning seat 21, an outer diameter of the second boss 211 is larger than an inner diameter of the second sleeve 220, and the second boss 211 can abut against an end of the second sleeve 220 close to the first sleeve 210 to limit a depth of the positioning seat 21 extending into the second sleeve 220; when the insert rod 10 abuts against the second boss 211 of the positioning seat 21 through the first boss 111, the first matching portion 122 and the second matching portion 216 are matched with each other.

So set up, whether constructor through observing first boss 111 and positioning seat 21 second boss 211 butt, can be convenient and in time learn that inserted bar 10 and positioning seat 21 have formed reliable meshing fixed for the butt joint condition of grafting cooperation subassembly 100 is more directly perceived, is favorable to the construction operation high efficiency to go on.

In order to simplify the structure of the insertion matching assembly 100, improve the reliability of the combination of the first boss 111 and the insertion rod 10 and the combination of the second boss 211 and the positioning seat 21, and reduce the manufacturing cost of the insertion rod 10 and the positioning seat 21, the first boss 111 and the insertion rod 10 are integrally formed; and/or the second boss 211 and the positioning seat 21 are integrally formed.

Preferably, the first boss 111 and/or the second boss 211 are annular protrusions. So set up, pressure between first boss 111 and the first sleeve 210, and/or second boss 211 and the second sleeve 220 can disperse and act on the annular terminal surface of first boss 111 and second boss 211, also promptly first boss 111 evenly undertakes butt pressure with second boss 211, and the butt between inserted bar 10 and first sleeve 210, positioning seat 21 and the second sleeve 220 is more steady.

It is understood that in other embodiments, there may be one or more first bosses 111 and/or second bosses 211, as long as they can function as a stop; the first bosses 111 are annularly and uniformly distributed on the outer peripheral wall of the insert rod 10 by taking the axis of the insert rod 10 as a center, and the second bosses 211 are annularly and uniformly distributed on the outer peripheral wall of the positioning seat 21 by taking the axis of the positioning seat 21 as a center.

Preferably, the cross-sectional shape of the first boss 111 on the axial plane of the plunger 10 is a circular arc or an elliptical arc; and/or the cross section of the second boss 211 on the axial plane of the positioning seat 21 is in the shape of an arc or an elliptic arc.

Further, the transition position between the first boss 111 and the peripheral wall of the connecting portion 11 and/or the transition position between the second boss 211 and the peripheral wall of the positioning seat 21 are circular arc-shaped or elliptical arc-shaped. With such an arrangement, the first boss 111 and the second boss 211 have smooth edge profiles, and are not easy to cause local stress concentration and further fracture, crush or abrasion.

In one embodiment, the first boss 111 may also have a polygonal prism-shaped structure in a radial cross section, for example, the first boss 111 may have a regular hexagonal prism structure similar to a nut head.

So set up, the first boss 111 of polygon prism form can form the fixed cooperation of splining with outside clamping tool, and this is favorable to the constructor to use the circumference outer wall of the first boss 111 of conventional outside instrument centre gripping, and then presss from both sides the inserted bar 10 tight fixedly to conveniently peg graft the assembly of cooperation subassembly 100.

The expanding member 22 is used for expanding and deforming the insert rod 10 radially outward, so as to fix the first matching portion 122 and the second matching portion 216. The expanding member 22 is formed separately from the second sleeve 220 and at least partially received in the positioning seat 21. When the insert rod 10 extends into the positioning seat 21, the expanding member 22 is inserted into the first groove 123 and abuts against the inner wall surface of the first groove 123, and the inserting portion 12 is expanded radially outward under the pressure of the expanding member 22, so that the first matching portion 122 and the second matching portion 216 are matched and fixed. Preferably, the spreader 22 is fixedly connected to the inner wall surface of the second sleeve 220 by a screw thread.

It is understood that the spreader 22 can also be integrally formed with the positioning base 21, as shown in fig. 2. At this time, the cross-sectional shape of the positioning member 20 on the axial plane passing through the axis thereof is E-shaped or chevron-shaped; the expanding piece 22 can be formed separately from the second sleeve 220 and welded and fixed; in addition, the positioning seat 21 and the expanding member 22 can also be formed separately and then fixedly connected by a non-detachable manner, such as welding, screwing, tight fitting, etc.

Preferably, the first recess 123 is a blind slot extending in the spigot 12.

Please refer to fig. 1 to 8 again. The plug-in matching assembly and the plug-in structure provided by the invention are suitable for connecting the assembled building nodes.

In one embodiment, the expanding member 22 includes an expanding portion 222 and a supporting portion 221 fixed to each other, the expanding portion 222 is accommodated in the positioning seat 21, and the supporting portion 221 can be accommodated in the positioning seat 21 or can extend out from one end of the positioning seat 21 away from the first sleeve 210. The expanding portion 222 is used for inserting into the first groove 123 and expanding the inserted rod 10, and the supporting portion 221 is used for realizing the fixed connection between the expanding member 22 and the second sleeve 220. The supporting portion 221 is fixedly disposed at an end of the second sleeve 220 opposite to the first sleeve 210. Preferably, the outer peripheral wall of the sleeve is provided with an external thread section fixedly connected with the second sleeve 220.

The term "expand the plunger 10" means that the outer diameter of the portion of the plunger 10 that is expanded is increased.

In the present embodiment, the support portion 221 is integrally formed with the expanding portion 222. It is understood that in other embodiments, the supporting portion 221 and the expanding portion 222 may be formed separately and fixedly connected. For example, the expanding member 22 and the positioning seat 21 are separately molded, and the supporting portion 221 of the expanding member 22 is connected with the positioning seat 21 by screw, welding, gluing or interference. So set up, positioning seat 21 and expand the piece 22 and can process respectively and realize relative fixed connection, and the fixed connection of supporting part 221 and positioning seat 21 easily realizes and the good reliability, has improved the axiality after inserted bar 10 and positioning seat 21 are pegged graft fixedly.

The expanding portion 222 is fixedly disposed on the supporting portion 221, protrudes toward the insert rod 10 along the axis of the second sleeve 220 and extends into the positioning seat 21, and an annular insertion space 214 for the insert rod 10 to enter is formed between the inner wall surface of the positioning seat 21 and the outer peripheral wall of the expanding portion 222.

It is understood that in other embodiments, the supporting portion 221 may also be fixed to the inner peripheral wall of the positioning seat 21 by screw thread, tight fit, or glue, or fixed to the inner wall surface of the second sleeve 220 by tight fit or glue, as long as the expanding portion 22 can be fixed to the positioning seat 21, and an annular insertion space 214 is formed between the expanding portion 222 and the inner wall surface of the positioning seat 21 so as to facilitate the insertion of the insertion rod 10.

When the inserting and connecting assembly 100 is inserted and fixed, and after the inserting and connecting structure 200 in the fixed state of butt joint is formed by installing the first sleeve 210 and the second sleeve 220, the first sleeve 210, the inserted bar 10, the positioning seat 21, the expanding piece 22 and the second sleeve 220 are all coaxially arranged, and are coaxially arranged with the axial reinforcing steel bar 230 in the prefabricated building pile connected with the first sleeve 210 and the second sleeve 220.

Further, as a preferred embodiment, a first latch set 1221 extending along the axial direction is provided on the outer peripheral wall of the insertion part 12, and the first latch set 1221 forms the first matching part 122; the inner peripheral wall of the positioning seat 21 is provided with a second latch group 2161 capable of being engaged with the first latch group 1221, and the second latch group 2161 forms the second mating portion 216. The plunger 10 and the positioning assembly 20 are engaged with each other by the first latch set 1221 and the second latch set 2161 for fixing.

So set up, be connected more reliably between inserted bar 10 and the locating component 20, combine closely the load limit higher, the stability after grafting cooperation subassembly 100 butt joint is fixed is better.

It is understood that in other embodiments, the first mating portion 122 and the second mating portion 216 may not be provided with the first latch set 1221 and the second latch set 2161, for example, a latch recess (not shown) and a latch protrusion (not shown) may be provided respectively, or a mating surface capable of forming a tight-fit fixing may be provided, and the fastening is performed by a latch fit or a tight-fit fixing, but not limited to the above-mentioned manner of engaging and fixing teeth. In addition, the shape of the latch is not limited to the shape shown in the figure, and the latch may also be a ratchet with a triangular axial section or other common anti-pulling tooth shapes, which are not limited herein.

Specifically, the first latch group 1221 includes a plurality of first latches of annular configuration arranged axially along the plug rod 10, and the second latch group 2161 includes a plurality of second latches of annular configuration arranged axially along the plug rod 10; the number of the first clamping teeth is less than or equal to that of the second clamping teeth.

Due to the arrangement, the meshing of the plurality of first clamping teeth and the plurality of second clamping teeth increases the meshing contact area of the inserted link 10 and the positioning assembly 20, the inserted link 10 and the positioning assembly 20 are firmly meshed and fixed, the inserted link 10 and the positioning assembly 20 are not easy to separate or slip off under the action of external force, and the fixing reliability between the inserted link 10 and the positioning assembly 20 is improved; in addition, the first latch group 1221 of the plug rod 10 can be fully used for being meshed with the second latch group 2161, so that the plug rod 10 and the positioning assembly 20 are fully meshed, and the meshing rate of the first latch group 1221 is ensured.

It should be noted that, the first latch group 1221 and the second latch group 2161 are engaged and fixed, and not limited to the number of latches in which the first latch and the plurality of second latches are engaged in a one-to-one correspondence, but not limited to the shape of the first latch matching the shape of the tooth socket of the second latch, as long as the two are engaged to keep the inserted link 10 and the positioning assembly 20 reliably fixed relative to each other. In other words, the number of the first latch and the second latch may be different, the shape of the first latch may be different from the shape of the tooth space between the two second latches, and particularly, the first latch near the supporting portion 221 may only form partial contact engagement with the second latch, so long as the inserted link 10 is ensured to reach the predetermined inserting position in the positioning assembly 20, and sufficient engagement fixation of the inserted link 10 and the positioning assembly 20 can be achieved regardless of the degree of the engagement contact of the first latch and the second latch.

Please refer to fig. 8. In one embodiment, a first latch tooth height of the first latch tooth group 1221 near the insertion start point of the inserted link 10 is smaller than a first latch tooth height relatively far from the insertion start point of the inserted link 10, that is, a plurality of first latch tooth heights of the first latch tooth group 1221 decrease along a direction in which the inserted link 10 extends into the positioning assembly 20 or a direction from the propping portion 222 to the supporting portion 221. The tooth height is a height difference between the tooth top of the first latch and the tooth groove adjacent to the tooth top in the radial direction of the inserted link 10. The dimension H in fig. 8 corresponds to the tooth height of the first latch.

The insertion starting point of the insertion rod 10 refers to an end of the insertion rod 10 relatively far away from the first sleeve 210, that is, an end of the insertion rod which enters the insertion space 214 first when the insertion rod 10 enters the positioning assembly 20; the insertion direction is a direction in which one end of the spreading portion 222 away from the support portion 221 is directed toward the support portion 221 along the axial direction of the second sleeve 220.

So set up, be favorable to reducing the resistance when pegging graft and the meshing of inserted bar 10 and locating component 20, realize a plurality of first latches and the abundant meshing of second latch and fix. Especially when the radial dimension of the strutting portion 222 is increasing along the direction close to the supporting portion 221, the resistance and the deformation amount when the inserted link 10 extends into the inserting space 214 are increased, the fixed resistance and the difficulty of the engagement of the first latch and the second latch which are relatively close to the inserting starting point on the first latch group 1221 are increased, so that the reduction of the height of the first latch along the direction in which the inserted link 10 is inserted into the positioning assembly 20 is beneficial to reducing the difficulty of the engagement, and the connection strength can be ensured.

Please refer to fig. 6. In one embodiment, the number density of the first latches tends to decrease in the insertion direction of the insert rod 10.

So set up, first latch is sparse along the inserted direction of inserted bar 10 gradually, can further reduce the fixed degree of difficulty of first latch and second latch meshing, also is favorable to guaranteeing that distraction portion 222 can fully peg graft in first recess 123.

Please refer to fig. 7. In one embodiment, the thickness of the first plurality of latches increases along the insertion direction of the insert rod 10. The tooth thickness refers to a dimension of the first latch along the axial direction of the insert rod 10, and a dimension D in fig. 7 is the tooth thickness corresponding to the first latch.

With the arrangement, the strength of the first latch is increased along the insertion direction of the inserted link 10, so that the inserted link 10 and the positioning component 20 are combined more tightly and stably, and the first latch close to the insertion starting point of the inserted link 10 is prevented from being broken; in addition, the tooth thickness of the first latch relatively close to the insertion starting point is greater than the tooth thickness of the first latch relatively far away from the insertion starting point, so that the second latch on the positioning component 20 close to the insertion rod 10 is not easy to be engaged with the first latch close to the insertion starting point in advance, thereby avoiding that the first latch cannot be sufficiently engaged with the second latch and ensuring that the insertion rod 10 is fully inserted into the positioning component 20.

As a preferred embodiment, among the plurality of first latches of the first latch group 1221, the first latch closest to the insertion start point of the inserted link 10 has a tooth thickness greater than or equal to that of the other first latches.

With the arrangement, the first latch closest to the insertion starting point can bear larger meshing pressure than other first latches, so that the strength and the force bearing capacity of the inserted link 10 at one end of the insertion starting point are improved, and the yield deformation or the fracture failure of the insertion starting point of the inserted link 10 is avoided.

It is understood that in other embodiments, the plurality of first latches on the insert rod 10 and the plurality of second latches on the positioning assembly 20 may also be latch structures with the same shape, i.e. uniform tooth height and tooth thickness; the number density of the first latch and the second latch in the axial direction of the insert rod 10 or the positioning assembly 20 may also be uniform, that is, the distribution of the first latch and the second latch on the insert rod 10 and the positioning assembly 20 may also be uniform.

In one embodiment, the insertion part 12 comprises a plurality of fins 121, the plurality of fins 121 are spaced apart from each other and are disposed around the axis of the insertion rod 10, and the plurality of fins 121 surround to form the first groove 123. During the insertion of the plug rod 10 into the positioning assembly 20, the plurality of fins 121 enter the insertion space 214 between the expanding portion 222 and the second mating portion 216, and are expanded radially outward along the plug rod 10 by the pressing action of the expanding member 22 so as to be away from each other, so that the first latch set 1221 is engaged with the second latch set 2161.

The arrangement of the fins 121 further improves the deformation capacity and the deformation range of the inserted link 10 under the extrusion action of the opening part 222, and reduces the probability of strength damage of the inserted link 12 during deformation. Specifically, the number of the fins 121 is 2 to 8. When there are two fins 121, the projection areas of the two fins 121 on the radial plane of the insert rod 10 are two semi-circular arcs or two arches; when the number of the fins 121 is 3 or more than 3, the plurality of fins 121 are uniformly arranged with the axis of the insert rod 10 as the center.

Please refer to fig. 5 again. In one embodiment, the plurality of fins 121 are gradually tapered along the insertion direction of the insert rod 10, and in an unstressed state, the outer diameter of the insert rod 10 at the end relatively close to the insertion starting point is smaller than the outer diameter of the end relatively far from the insertion starting point.

So set up, when strutting portion 222 and pegging graft in first recess 123, because fin 121 expands and props the deformation, fin 121 has the shrink trend under the internal stress effect to produce the packing force to strutting portion 222 periphery wall, therefore can further strengthen the fixed effect between inserted bar 10, positioning seat 21 and the piece 22 that expands on fin 121 and the fixed basis of positioning seat 21 meshing, the three combines inseparably, firmly, the durability and the shock resistance of grafting cooperation subassembly 100 are showing and are promoting.

It will be appreciated that in other embodiments, the spigot 12 may not be provided with the fins 121, but may take other forms of deformable structure. For example, a contraction opening communicated with the first groove 123 is formed in the side wall of the insertion part 12, at this time, the projection shape of the insertion part 12 on the radial plane of the insertion rod 10 is approximately C-shaped, when the expanding part 222 is inserted into the first groove 123, the width of the contraction opening is increased, so that the insertion part 12 area on two sides of the contraction opening is expanded and can be matched with the inner wall surface of the positioning seat 21; in addition, in other embodiments, the insertion part 12 does not need to be gradually drawn in the insertion direction of the insertion rod 10, as shown in fig. 6 to 8, the insertion part 12 may also be a cylindrical structure coaxial with the connection part 11; or the fins 121 have an equal outer diameter dimension in the insertion direction of the insert pin 10.

Please refer to fig. 5 to 8 again. In one embodiment, one of the first latch set 1221 and the second latch set 2161 is provided with a first guide portion 13, and the other is provided with a second guide portion 14 matching with the first guide portion 13; the first guide portion 13 is disposed obliquely with respect to a radial plane of the plunger 10. The first blocking portion 15 is disposed on a side of the first latch group 1221 or the second latch group 2161 facing away from the first guiding portion 13, and the first blocking portion 15 can block the plunger 10 from being pulled out of the positioning assembly 20.

Specifically, the first guiding portion 13 is an annular or arc-shaped inclined surface on the first latch on the side far away from the first sleeve 210, and the first stopping portion 15 is an annular or arc-shaped inclined surface on the first latch on the side far away from the second sleeve 220; the second guiding portion 14 is an annular inclined surface on the second latch near the first sleeve 210. The inclination tendency of the first guide portion 13 is: the outer diameter dimension of the first guide portion 13 decreases in the direction in which the insert rod 10 protrudes into the positioning assembly 20.

Preferably, please refer to fig. 4. In one embodiment, after cutting along the axial direction of the plug-in mating component 100, the first stopping portion 15 on the insert rod 10 is in a barbed shape, that is, on an axial cross section of the plug-in mating component 100, an included angle between the first stopping portion 15 and a root bottom of an adjacent first latch is an acute angle.

It is understood that, in other embodiments, the angle between the first stopping portion 15 and the bottom of the root of the adjacent first latch may also be a right angle, as shown in fig. 3, when the plug-in mating assembly 100 is cut along the axial direction.

By the arrangement, the first guide part 13 and the second guide part 14 can form sliding fit contact, so that the centering and positioning effects of the positioning component 20 on the inserted rod 10 can be improved, the coaxiality of the expansion piece 22, the inserted rod 10 and the positioning seat 21 can be improved, the insertion resistance can be further reduced, and the low-resistance quick butt joint of the insertion fit component 100 can be realized; the first stopping portion 15 can improve the reliability of the tooth engagement between the inserted link 10 and the positioning assembly 20, prevent the inserted link 10 from being separated from the positioning assembly 20 due to external interference, and ensure that the inserted link 10 and the positioning seat 21 are always in tooth engagement when the expanding member 22 expands the inserted link 10.

Further, the insert rod 10 further forms a third guide portion 16 at an end of the first groove 123 opposite to the first sleeve 210, and the third guide portion 16 is used for guiding the opening portion 222 into the first groove 123.

Specifically, the third guide portion 16 is a chamfered structure in the opening of the first groove 123 near the support portion 221. The third guiding portion 16 can reduce the insertion resistance between the opening edge of the first groove 123 and the end of the opening portion 222, and guides the opening portion 222 to center, so as to drive the opening portion 222 to be quickly inserted into the first groove 123, thereby improving the insertion efficiency, and preventing the opening portion 222 from being damaged due to uneven stress on the insertion portion 12 caused by the deflection of the first groove 123.

In one embodiment, the peripheral wall of the plunger 10 is provided with at least one marking for indicating the depth of the plunger 10 extending into the insertion space 214 of the positioning assembly 20. Specifically, the marks include scales distributed along the axial direction of the insert rod 10; the scale comprises numbers; is marked as a ring and extends in the circumferential direction of the outer wall of the plunger 10.

With the arrangement, the position of the inserted link 10 in the positioning component 20 can be more visually shown by the mark on the peripheral wall of the inserted link 10, and the butt joint condition of the inserting matching component 100 can be clearly fed back to a construction site worker in a form of presenting the relative position information between the positioning component 20 and the mark, so that the efficiency of construction operation is improved; the distance between the scales can correspond to the insertion depth of the inserted link 10 in the positioning assembly 20, and the insertion depth of the inserted link 10 in the positioning assembly 20 can be accurately reflected through the scales; scales are conveniently marked as the inserting depth of the inserted link 10 in the positioning component 20, so that the inserting depth information of the inserted link 10 in the positioning component 20 is more intuitive and clear; in addition, the indicia can be seen at any radial position of the bayonet 10 to facilitate timely notification to the job site personnel of the mating condition of the bayonet fitting 100.

Please refer to fig. 2 again. In one embodiment, the radial dimension of the expanding portion 222 increases in the insertion direction of the insert rod 10, and the radial dimension of the expanding portion 222 increases in the insertion direction of the insert rod 10; correspondingly, the radial dimension of the first groove 123 increases in the insertion direction of the insert rod 10. Along with the increase of the depth of the expanding part 222 inserted into the first groove 123, the deformation amount of the inserting part 12 of the inserting rod 10, which is expanded and deformed along the radial direction, is increased, and the expanding force applied by the expanding part 222 to the inner wall surface of the first groove 123 is increased, so that the inserting rod 10 is deformed more sufficiently, and the inserting rod 10 and the positioning seat 21 are engaged sufficiently and reliably.

Preferably, the spreading portion 222 is conical or truncated cone-shaped, and the spreading portion 222 matches the size of the first groove 123.

With such an arrangement, the shape of the expanding part 222 is simple, the expanding part 22 is convenient to process and form, and the deformation process of the peripheral wall of the inserted rod 10 is mild, so that the difficulty in inserting the inserted rod 10 and the expanding part 22 is reduced; in addition, when the insert rod 10 is fully inserted into the positioning seat 21, the opening portion 222 is tightly attached to the inner wall surface of the first groove 123, so that the integral stability of the insert mating assembly 100 is better, and the insert rod 10 and the positioning assembly 20 are not easy to shake or dislocate, which is beneficial to the reliable service of the insert mating assembly 100 and the insert structure 200.

Preferably, the end of the opening part 222 relatively close to the inserted rod 10 is provided with a chamfer, the chamfer makes the surface shape of the end of the opening part 222 close to the inserted rod 10 passivated, so as to prevent the end of the inserted rod 10 from damaging the surface of the opening part 222, and the chamfer can also provide a guiding function when the opening part 222 enters the first groove 123, so as to realize the centered insertion of the opening part 222 and the inserted rod 10.

Preferably, the maximum movable range area of the propping-open part 222 at the end relatively far from the supporting part 221 is smaller than the area of the first groove 123 in the radial plane of the inserted rod 10.

So set up, the inside space that can supply the portion 222 of strutting to keep away from the tip activity of supporting part 221 that forms of first recess 123 to just leave the space surplus, avoid when expanding strutting piece 22 moves about relative inserted bar 10, the tip that the portion 222 of strutting keeps away from supporting part 221 receives the influence of first recess 123 inner wall, prevents that it from being extruded or colliding by first recess 123 inner wall, consequently can reduce the degree of difficulty that expands strutting piece 22 and inserted bar 10 and peg graft, resistance when eliminating the two and peg graft.

Please refer to fig. 6 again. In one embodiment, one of the end of the insert rod 10 and the end of the positioning assembly 20 is provided with a first guide 231, and the other is provided with a second guide 232; the first guiding portion 231 is used for guiding the insertion rod 10 to extend into the positioning assembly 20, and the second guiding portion 232 is matched with the first guiding portion 231 to guide the insertion rod to extend into the positioning assembly 20.

The first guide part 231 can reduce the insertion resistance when the insertion rod 10 starts to enter the positioning component 20, so that the insertion rod 10 can conveniently and quickly enter the insertion space, the coaxiality of the insertion rod 10 and the positioning component 20 during insertion is improved, the centering performance of the insertion rod 10 and the positioning component 20 is further ensured, the low-resistance quick butt joint of the insertion matching component 100 is facilitated, and the butt joint efficiency is improved; the second guiding portion 232 cooperates with the first guiding portion 231 to further reduce the insertion resistance between the insertion rod 10 and the positioning assembly 20, thereby improving the insertion smoothness.

Specifically, the first guide 231 and the second guide 232 are annular inclined surfaces extending circumferentially around the axis of the positioning unit 20, and preferably, circular truncated cone side surfaces inclined with respect to the axis of the positioning unit 20 and contacting each other when they are fitted to each other. The inclination trend of the two is as follows: the outer diameter of the first guide part 231 or the second guide part 232 away from the first sleeve 210 is smaller than the outer diameter of the first guide part 231 or the second guide part 232 close to the first sleeve 210, that is, the outer diameter of the first guide part 231 or the second guide part 232 decreases in the direction of inserting the plunger 10 into the positioning assembly 20; the inclination angle of the annular inclined plane relative to the axis of the inserted link 10 is 5-80 degrees, and the preferred inclination angle range is 15-75 degrees.

With the arrangement, the first guide part 231 and the second guide part 232 can be in sliding contact with each other, so that the frictional resistance between the positioning assembly 20 and the end part of the inserted link 10 can be remarkably reduced, the abrasion degree between the positioning assembly 20 and the inserted link 10 is reduced, and the inserting and fixing efficiency between the inserted link 10 and the positioning assembly 20 is higher; in addition, the first guide 231 and the second guide 232 are in sufficient contact when being matched with each other, so that the pressing force between the end of the plunger 10 and the positioning assembly 20 can be dispersed and uniformly borne, and the abrasion of the contact area between the end of the plunger 10 and the positioning assembly 20 is avoided.

Furthermore, the first guiding portion 231 is located inside the end opening of the positioning seat 21 close to the first sleeve 210, the second guiding portion 232 is located at the end of the insert rod 10 away from the first sleeve 210, the first guiding portion 231 is connected to the second matching portion 216, and the second guiding portion 232 is connected to the first matching portion 122.

With such an arrangement, when the guiding insertion function of the insertion rod 10 is completed by the first guiding portion 231, the first matching portion 122 can be matched and fixed with the second matching portion 216, so that the guiding insertion step and the matching fixing step are closely connected in the insertion process of the insertion matching component 100, and the insertion efficiency of the insertion matching component 100 is further improved.

Preferably, the first guide portion 231 and the second mating portion 216 smoothly transition. When the guiding insertion of the plunger 10 and the positioning assembly 20 is completed, the first engaging portion 122 and the second engaging portion 216 can be smoothly and lowly engaged, so as to smoothly start the step of engaging and fixing the plunger 10 and the positioning assembly 20.

In one embodiment, the peripheral wall of the first latch closest to the insertion start point of the spindle 10 is disposed obliquely to the axis of the spindle 10 and forms a guide surface which is substantially in the form of an annular truncated cone side surface, the outer diameter dimension of which decreases in a direction away from the first sleeve 210.

So set up, at the in-process to the application of force of inserted bar 10, the guide face can drive the first latch that is closest to the insertion starting point and pass through a plurality of second latches that are close to first sleeve 210 fast to make inserted bar 10 move as early as possible to the grafting extreme position of first recess 123, finally with locating component 20 full meshing fixed.

Further, the length of the socket 12 in the axial direction of the plunger 10 is 1 to 20 times the length of the connecting portion 11 in the axial direction of the plunger 10.

In one embodiment, the positioning assembly 20 is provided with a mounting structure that facilitates the use of an external tool by a constructor to mount the positioning assembly 20 within the second sleeve 220. Through the clamping or holding of the mounting structure by an external tool, a constructor can apply fastening force to the positioning component 20 more conveniently, the mounting convenience of the positioning component 20 is improved, and the time required for mounting the positioning component 20 in the second sleeve 220 is saved. The mounting structure includes several forms, such as mounting holes or mounting portions.

Please refer to fig. 1 to 4 again. Specifically, the end of the positioning seat 21 relatively close to the first sleeve 210 is provided with a mounting hole 215 in a polygonal hole, and the mounting hole 215 is preferably an inner hexagonal hole or an inner octagonal hole, and can form a rotation-stop tight fit with a conventional external tool, so that a constructor can manipulate the external tool to apply a holding force to the inner wall of the mounting hole 215. Of course, the mounting hole 215 may be a polygonal hole having another shape as long as an external tool can be tightly fitted to the inner wall surface of the mounting hole 215 in a rotation stop manner.

Further, be provided with the installation department 212 that is polygon prism structure on the portion 222 periphery wall that struts, installation department 212 preferably adopts outer hexagonal or outer eight corners structure, can form the tight fit of spline with conventional external instrument to the constructor manipulates external instrument in order to exert clamping-force to installation department 212 periphery wall. Of course, the mounting portion 212 may have a polygonal prism structure with other shapes as long as an external tool can form a rotation-stop tight fit with the outer peripheral wall of the mounting portion 212.

Please refer to fig. 1 to 4 again. In one embodiment, a stop step 201 is disposed in the inner wall of the second sleeve 220, and the stop step 201 is used for stopping the depth of the positioning component 20 extending into the second sleeve 220.

Specifically, the inner diameter of the second sleeve 220 on the side relatively far from the first sleeve 210 is smaller than the outer diameter of the support portion 221, and the stop step 201 is used for stopping the expanding piece 22 so as to realize the axial positioning of the positioning assembly 20 in the second sleeve 220. When external construction equipment applies pressure to the insert rod 10, the stopper step 201 can support the spreader 22 so that the spreader 222 enters the first groove 123.

So set up, second sleeve 220 passes through backstop step 201 and restricts the axial position of locating component 20 in second sleeve 220, guarantees the relative position precision of inserted bar 10 and second sleeve 220, and then guarantees the assembly precision of first sleeve 210 and second sleeve 220.

Further, the outer diameter of the supporting portion 221 is larger than the inner diameter of the positioning seat 21, and the supporting portion 221 is located in the second sleeve 220 through the stopping step 201 and the positioning seat 21.

So set up, positioning seat 21 and backstop step 201 synergism are injectd the supporting part 221 in the clearance between positioning seat 21 and backstop step 201 to realize expanding support piece 22 along the two-way backstop limiting displacement of second sleeve 220 axial.

Furthermore, when the second boss 211 abuts against the second sleeve 220, the distance between the positioning seat 21 and the stopping step 201 is greater than the height of the supporting portion 221, that is, the supporting portion 221 can move in the gap defined by the positioning seat 21 and the stopping step 201 along the axial direction, so that the expanding member 22 can be movably accommodated in the second sleeve 220.

So set up, thereby can prevent that supporting part 221 from contacting positioning seat 21 and leading to the unable butt of second boss 211 to be close to the tip of first sleeve 210 in second sleeve 220, backstop step 201 and second sleeve 220 have formed the space that can supply positioning seat 21 fully to stretch into second sleeve 220 between the tip, and still leave the activity space surplus, so that positioning seat 21 does not receive the influence of supporting part 221 when second boss 211 butt second sleeve 220, avoid positioning seat 21 can't fully stretch into in the second sleeve 220.

In one embodiment, the stopping step 201 is an annular concave surface, the concave direction of the stopping step is toward one end of the second sleeve 220 away from the first sleeve 210, one side of the supporting portion 221, which is relatively away from the expanding portion 222, is provided with a third protrusion 213, and the third protrusion 213 can be accommodated in the annular concave surface.

So set up, through annular concave surface and the protruding 213 cooperation of third between backstop step 201 and the supporting part 221, realized the radial positioning effect to supporting part 221, still further increased the area of contact between backstop step 201 and the supporting part 221 simultaneously so that expand piece 22 and the laminating between the backstop step 201 more stable, can restrict expand piece 22 and radially rock for second sleeve 220.

Please refer to fig. 1 again. The first gap 24 is formed between the positioning seat 21 and the expanding member 22, and the distance between the positioning seat 21 and the stopping step 201 in the axial direction of the second sleeve 220 is greater than the axial height of the supporting portion 221 of the expanding member 22, so that the first gap 24 is formed on the side of the end of the positioning seat 21, which is relatively close to the first sleeve 210, and the supporting portion 221. The principle of the plug-in fixing of the plug-in mating assembly 100 of the present invention is as follows: when the insert rod 10 is inserted into the insertion space 214 of the positioning seat 21, the expanding portion 222 enters the first groove 123, and exerts a supporting force on the inner wall surface of the first groove 123, so that the insert rod 10 is radially expanded and deformed outwards, and the outer diameter of the insert portion 12 is increased until the first matching portion 122 matches with the second matching portion 216. In brief, the expanding portion 222 expands the inserting portion 12 to generate an outward expansion deformation of the inserting rod 10, which can be fixed in cooperation with the positioning component 20.

The technical features of the above embodiments may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as being within the scope of the present specification as long as there is no such a combination.

It should be understood by those skilled in the art that the above embodiments are only for illustrating the present invention and are not to be used as a limitation of the present invention, and that suitable changes and modifications of the above embodiments are within the scope of the claimed invention as long as they are within the spirit and scope of the present invention.

Claims (16)

1. The utility model provides a grafting cooperation subassembly, its characterized in that, includes inserted bar (10) and locating component (20), first recess (123) that extend along the axis direction are seted up in inserted bar (10), locating component (20) are including strutting portion (222), the periphery wall epirelief of inserted bar (10) is equipped with first cooperation portion (122), be provided with second cooperation portion (216) on locating component (20), inserted bar (10) can stretch into locating component (20), it can stretch into to strut portion (222) in first recess (123) and strut inserted bar (10), and make first cooperation portion (122) with second cooperation portion (216) cooperation is fixed.

2. The plug-fit assembly according to claim 1, wherein the positioning assembly (20) comprises a positioning seat (21) and an expanding member (22), the second fitting portion (216) is located at the positioning seat (21), the positioning seat (21) is further configured to be connected and fixed with an external structure, and the expanding portion (222) is located at the expanding member (22);

the positioning seat (21) and the expanding piece (22) are integrally formed, or the expanding piece (22) and the positioning seat (21) are separately formed, and the expanding piece (22) is in threaded connection, welding, gluing or interference connection with the positioning seat (21).

3. The plug-fit assembly according to claim 2, wherein the outer peripheral wall of the plug shaft (10) is provided with a first set of latch teeth (1221) extending in the axial direction and forming the first fitting portion (122), and the inner peripheral wall of the positioning seat (21) is provided with a second set of latch teeth (2161) cooperating with the first set of latch teeth (1221) and forming the second fitting portion (216); the spreading part (222) can extend into the first groove (123) and spread the inserted bar (10) so as to enable the first clamping tooth group (1221) and the second clamping tooth group (2161) to be meshed with each other.

4. The plug-in mating assembly according to claim 3, characterized in that a first guide (13) is provided on one of the first (1221) and second (2161) sets of bayonet teeth, the first guide (13) being arranged obliquely with respect to a radial plane of the bayonet rod (10); and/or the presence of a catalyst in the reaction mixture,

one side of the first clamping tooth group (1221) or the second clamping tooth group (2161) which is relatively deviated from the first guide part (13) is provided with a first stopping part (15), and the first stopping part (15) can stop the inserted bar (10) to be pulled out of the positioning seat (21).

5. A plug-fit assembly according to claim 3, characterized in that the radial dimension of the spreading portion (222) increases in the direction of insertion of the plug rod (10); or,

the opening part (222) is conical or truncated cone-shaped.

6. The plug-fit assembly according to claim 3, wherein the plug rod (10) comprises a connecting portion (11) and a plug portion (12) which are connected with each other, the connecting portion (11) is used for connecting with an external structure, the plug portion (12) comprises a plurality of fins (121), the plurality of fins (121) surround and form the first groove (123), and the plurality of fins (121) can move away from each other under the action of the expanding piece (22) to enable the first clamping tooth group (1221) and the second clamping tooth group (2161) to be meshed with each other.

7. Plug-in mating assembly according to claim 6, characterized in that the number of fins (121) is 2 to 8; and/or the presence of a catalyst in the reaction mixture,

the first latch group (1221) comprises a plurality of first latches, the second latch group (2161) comprises a plurality of second latches, and the first latches and the second latches are annular latch structures arranged along the axial direction; and/or the presence of a catalyst in the reaction mixture,

the periphery wall of inserted bar (10) is equipped with at least one mark, the mark is used for the sign inserted bar (10) stretch into the degree of depth of locating component (20).

8. A plug structure, comprising a first sleeve (210), a second sleeve (220) and the plug mating assembly of any one of claims 1 to 7, wherein the plug rod (10) is fixedly mounted on the first sleeve (210), and the positioning assembly (20) is fixedly mounted on the second sleeve (220).

9. Plug connection according to claim 8, characterized in that the positioning assembly (20) is screwed to the second sleeve (220).

10. The plugging structure according to claim 8, wherein a stopping step (201) is disposed in the second sleeve (220), the positioning assembly (20) comprises a positioning seat (21) and a expanding member (22), the expanding member (22) comprises a supporting portion (221) and an expanding portion (222) connected to each other, an outer diameter of the supporting portion (221) is larger than inner diameters of the stopping step (201) and the positioning seat (21), and the supporting portion (221) is positioned in the second sleeve (220) by the stopping step (201) and the positioning seat (21).

11. The plug structure according to claim 10, wherein a second boss (211) is protruded from an outer peripheral wall of the positioning seat (21), and the second boss (211) is used for limiting a depth of the positioning seat (21) extending into the second sleeve (220).

12. The plugging structure according to claim 11, wherein when the second protrusion (211) abuts against the second sleeve (220), a distance between the positioning seat (21) and the stopping step (201) is greater than a height of the supporting portion (221), so that the spreader (22) can be movably accommodated in the second sleeve (220).

13. Plug-in structure according to claim 12, characterized in that the maximum active range area of the spreading portion (222) at the end relatively far from the support portion (221) is smaller than the area of the first groove (123) in the radial plane of the plug rod (10).

14. The plug structure according to claim 12, wherein the opening portion (222) defines a second groove (223), and when the opening portion (222) extends into the first groove (123), the opening portion (222) can radially contract through the second groove (223).

15. The plugging structure according to claim 10, wherein the stopping step (201) is an annular concave surface, and a third protrusion (213) is disposed on a side of the supporting portion (221) opposite to the side away from the opening portion (222), and the third protrusion (213) can be received in the annular concave surface.

16. A precast pile connecting mechanism is characterized by comprising at least two precast building piles and an inserting structure, wherein the inserting structure is as claimed in any one of claims 8 to 15, a first sleeve (210) and a second sleeve (220) are fixedly arranged in the two precast building piles respectively, and the two precast building piles are connected through the inserting structure.

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